This information is provided free of charge by the Department of Industrial Relations from its web site at www.dir.ca.gov. These regulations are for the convenience of the user and no representation or warranty is made that the information is current or accurate. See full disclaimer at http://www.dir.ca.gov/od_pub/disclaimer.html.

Subchapter 4. Construction Safety Orders

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Appendix B: Handy Construction Data; Facts; and Information Plate B-1 Handy Things to Know

Handy Construction Data; Facts; and Information Plate B-1
Handy Things to Know
1. TO FIND -
(a) the circumference of a circle, multiply the diameter by 3.1416 (approx. 3 1/7).
(b) the diameter of a circle, multiply the circumference by .31831.
(c) the area of a circle, multiply the square of the diameter by .7854.
(d) the area of a triangle, multiply the base by 1/2 the perpendicular height.
(e) the volume of a sphere, multiply cube of the diameter by .5236.
A gallon of water weighs 8 1/2 pounds.
A gallon of water contains 231 cubic inches.
A cubic foot of water contains 7 1/2 gals., 1728 cubic inches and weighs 62 1/2 lbs.
In board measure all boards are assumed to be 1 inch thick. Area of a lineal foot multiplied by length in feet will give the surface contents in square feet.
PLATE B-1-a SANITATION OF PERSONAL SAFETY DEVICES
(except respiratory protective equipment)
Thorough scrubbing with soap and hot water is ordinarily adequate for cleaning purposes. When additional cleaning appears necessary, one of the following treatments should be used, in addition to the soap and water scrubbing:
(1) Immerse in boiling water for five (5) minutes.
(2) The method recommended by the manufacturer for cleaning and sterilizing.
After following any of these procedures, the equipment should be thoroughly rinsed with water and hung up to dry.
Such items that have been in contact with the skin of the wearer must be replaced if they cannot be cleaned as described.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Amendment of Plate B-1-a filed 1-17-80; effective thirtieth day thereafter (Register 80, No. 3).
2. Amendment of Plate B-1-a repealing paragraphs (1)-(2) and renumbering paragraphs filed 7-28-2006; operative 8-27-2006 (Register 2006, No. 30).
PLATE B-2 MEASURES
1 SQUARE MILE
 
= 640 acres
= 6400 square chains
1 ACRE
 
= 10 square chains
= 4840 square yards
= 43,560 square feet
= a square, each side of which is 208.7 feet
= 16 square rods
1 SQUARE CHAIN
 
= 484 square yards
= 4356 square feet
= 30.25 square yards
1 SQUARE ROD
 
= 272.25 square feet
= 625 square links
1 SQUARE YARD
 
= 9 square feet
1 SQUARE FOOT
 
= 144 square inches
= 0.1337 cu. feet
1 U.S. GALLON
 
= 231 cu. inches
= 4 quarts
= 8 pints
1 CUBIC FOOT
 
= 7.48 U.S. Gallons
PLATE B-3 WEIGHTS OF MATERIALS
Approximate Weight
Material
Per Cubic Foot -Lbs.
Aluminum
166
Ashes
43
Asphalt
81
Brass
524
Brick (common)
120 (about 3 tons per 1000)
Brick (fire)
145
Bronze
534
Concrete 150
(4050 lbs. per cu. yd.)
Copper
537
Crushed Rock
95 (2565 lbs. per cu. yd.)
Dry earth, loose
76 (2052 lbs. per cu. yd.)
Granite
179
Iron, casting
450
Lead
708
Lumber, Fir
32 (2666 lbs. 1000 ft.)
Lumber, Oak
62 (5166 lbs. 1000 ft.)
Marble
168
Mortar
100
Port. Cement
94 (376 lbs. per barrel)
River Sand
120 (3240 lbs. cu. yd.)
Steel
490
Tar
63
Tile
115
Water
62.5
Zinc 437
PLATE B-4 WEIGHTS OF METALS PER SQUARE FOOT
Thickness
Wrought
Cast
Inches
Iron
Iron
Steel
Copper
Tin
Zinc
Brass
Lead
Weights, Pounds per Square Foot
1/16
2.50
2.34
2.55
2.89
2.41
2.28
2.63
3.7
1/8
5.00
4.69
5.10
5.79
4.81
4.55
5.26
7.4
3/16
7.50
7.03
7.65
8.68
7.22
6.83
7.89
11.1
1/4
10.0
9.38
10.2
11.6
9.63
9.10
10.5
14.8
5/16
12.50
11.7
12.8
14.5
12.0
11.4
13.2
18.5
3/8
15.00
14.1
15.3
17.4
14.4
13.7
15.8
22.2
7/16
17.50
16.4
17.9
20.3
16.8
15.9
18.4
25.9
1/2 2
0.00
18.7
20.4
23.2
19.3
18.2
21.1
29.7
9/16
22.50
21.1
23.0
26.0
21.7
20.5
23.7
23.4
5/8
25.00
23.5
25.5
28.9
24.1
22.8
26.3
37.1
11/16
27.50
25.8
28.1
31.8
26.5
25.0
28.9
40.8
3/4
30.00
28.1
30.6
34.7
28.9
27.3
31.6
44.4
13/16
32.50
30.5
33.2
37.6
31.3
29.6
34.2
48.2
7/8
35.00
32.8
35.7
40.5
33.7
31.9
36.8
51.9
15/16
37.50
35.2
38.3
43.4
36.1
34.1
39.5
55.6
1
40.00
37.5
40.8
46.3
38.5
36.4
42.1
59.3
For rates in square inch, divide by 144.
PLATE B-5 WIND FORCE
Force of Wind in Pounds per Square Foot
Force
Force
Miles
per Square
Miles
per Square
per Hour
Foot -in Lbs.
per Hour
Foot -in Lbs.
1
0.005
20
1.969
2
0.020
25
3.075
3
0.044
30
4.429
4
0.079
35
6.027
5
0.123
40
7.873
6
0.177
45
9.963
7
0.241
50
12.30
8
0.315
55
14.9
9
0.400
60
17.71
10
0.492
65
20.85
12
0.708
70
24.1
14
0.964
75
27.7
15
1.107
80
31.49
16
1.25
100
49.2
18
1.55
PLATE B-6 RULE OF THUMB
(The following are not suggested as a substitute for accurate tables and reference material, but are sometimes useful in making a final safety check.)
Nails
Safe load lateral resistance in pounds equal eight (8) times the pennyweight.
1-6d nail = 8 x 6, or 48 pound
1-6d nail = 8 x 8, or 64 pounds
1-10d nail = 8 x 10, or 80 pounds
Manila Rope
Safe load in tons equals diameter in inches squared. Not accurate in sizes larger than one inch (1‘).
1‘ rope = 1 x 1, or 1 ton safe load
1/2‘ rope = 1/2 x 1/2, or 1/Ss4 ton safe load
For sisal rope, decrease safe loads by one-third
Plow-steel Cable
Safe load in tons is eight (8) times the diameter in inches squared.
1/2‘ rope = 1/2 x 1/2 = 1 /4 x 8 = 2 tons
Open Eye Hook
Safe load in tons is diameter of eye in inches squared.
2‘ hook, 2 x 2 = 4 tons
Shackle
Safe load in tons is diameter of pin in one-fourth inches (1/4‘) squared and divided by three (3).
1/2‘ diameter = 2 quarters
2 x 2 (/) 3 = 1 1/3 tons or 2,667 pounds
TABULAR OR GRAPHIC MATERIAL SET FORTH AT THIS POINT IS NOT DISPLAYABLE
Chains
Safe load in tons in six (6) times the square of the diameter of chain stock.
1/2‘ diameter chain stock
1/2 x 1/2 x 6 = 1 1/2 tons or 3,000 pounds
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Amendment filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).
PLATE B-7 DOUGLAS FIR “STRUCTURAL PLANKS” ESPECIALLY SUITED FOR SCAFFOLDS
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Repealer filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).
PLATE B-8 DOUGLAS FIR “SELECTED LUMBER” FOR ORDINARY SCAFFOLD PLANK SERVICE
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Repealer filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).
PLATE B-9
SQUARE COLUMNS -UNBRACED
ROUGH LUMBER -NOT SURFACED
Suggested Maximum Loads in Pounds - 1,000 Pounds per Square Inch Douglas Fir
SIZE OF COLUMN CROSS SECTION
Lenght in Feet
4‘x4‘
6‘x6‘
8‘x8‘
10‘x10‘
12‘x12‘
14‘x14‘
16‘x16‘
5
15,300
36,000
64,000
100,000
144,000
196,000
256.000
6
14,300
35,400
64,000
100,000
144,000
196,000
256,000
7
13,500
34,900
63,400
100,000
144,000
196,000
256,000
8
11,800
34,100
62,900
100,000
144,000
196,000
256,000
9
9,600
33,000
62,300
98,900
144,000
196,000
256,000
10
7,800
31,500
61,500
98,400
144,000
196,000
256,000
11
6,400
29,400
60,200
97,600
142,000
196,000
256,000
12
5,400
26,700
58,700
96,700
141,700
194,200
256,000
14
use a
20,100
54,300
93,800
139,600
192,800
258,700
16
larger size
15,400
47,400
89,400
136,600
190,700
251,900
18
use a
38,400
83,100
132,200
187,300
249,300
20
larger size
31,100
74,200
126,100
183,000
246,000
TABULAR OR GRAPHIC MATERIAL SET FORTH AT THIS POINT IS NOT DISPLAYABLE
History
1. Change without regulatory effect correcting error in Plate B-9 filed 5-28-91 pursuant to section 100, Title 1, California Code of Regulations (Register 91, No. 27).
PLATE B-10 SUGGESTED LOAD LIMITS FOR TIMBER BEAMS
Stress Grade Douglas Fir - 500 Pounds per Square Inch
(The loads given are for dressed beams which are slightly smaller than nominal sizes listed).
PLATE B-11 STRENGTH OF U.S. STANDARD BOLTS FROM 1/4‘ TO 2‘ DIAMETER
History
1. Editorial corrections of Diameter of Bolts second entry (Register 95, No. 21).
PLATE B-12 CALIFORNIA HIGHWAY PATROL STOPPING DISTANCE CHART
Note: Authority and reference cited: Section 142.3, Labor Code.
History
1. Repealer of Plate B-12 filed 4-27-79; effective thirtieth day thereafter (Register 79, No. 17).
PLATE B-13 MAXIMUM ALLOWABLE CONCENTRATIONS FOR MINERAL DUSTS
History
1. Repealer of Appendix Plate B-13 filed 10-18-77; effective thirtieth day thereafter (Register 77, No. 43).
PLATE B-13-a TABLE 1 -MINERAL DUSTS
History
1. Repealer of Appendix Plate B-13-a filed 10-18-77; effective thirtieth day thereafter (Register 77, No. 43).
PLATE B-14
TABLE 1
AMERICAN TABLE OF DISTANCES FOR STORAGE OF EXPLOSIVES MATERIALS
Note: Authority cited: Section 142.3, Labor Code, Reference: Section 142.3, Labor Code; and Section 12006, Health and Safety Code.
History
1. Repealer of New Plate B-14 filed 7-26-85; effective thirtieth day thereafter (Register 85, No. 30).
2. Repealer of New Plate B-14 filed 6-26-97; operative 7-26-97 (Register 97, No. 26).
Table 2
Table of Separation Distances of Ammonium Nitrate and Blasting Agents from Explosives or Balsting Agents
Donor Weight
Minimum Separation Distance
of Acceptor when Barricaded (ft.)
Minimum Thickness of
Pounds
Pounds
Ammonium
Artificial Barricades
Over
Not Over
Nitrate
Blasting Agent
(in.)
100
3
11
12
100
300
4
14
12
300
600
5
18
12
600
1,000
6
22
12
1,000
1,600
7
25
12
1,600
2,000
8
29
12
2,000
3,000
9
32
15
3,000
4,000
10
36
15
4,000
6,000
11
40
15
6,000
8,000
12
43
20
8,000
10,000
13
47
20
10,000
12,000
14
50
20
12,000
16,000
15
54
25
16,000
20,000
16
58
25
20,000
25,000
18
65
25
25,000
30,000
19
68
30
30,000
35,000
20
72
30
35,000
40,000
21
76
30
40,000
45,000
22
79
35
45,000
50,000
23
83
35
50,000
55,000
24
86
35
55,000
60,000
25
90
35
60,000
70,000
26
94
40
70,000
80,000
28
101
40
80,000
90,000
30
108
40
90,000
100,000
32
115
40
100,000
120,000
34
122
50
120,000
140,000
37
133
50
140,000
160,000
40
144
50
160,000
180,000
44
158
50
180,000
200,000
48
173
50
200,000
220,000
52
187
60
220,000
250,000
56
202
60
250,000
275,000
60
216
60
275,000
300,000
64
230
60
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
PLATE B-14a Types of Storage Facilities
Classes of Explosive
Storage
Materials, Which May Be
Type
Stored Therein
Division 1.1
Type 1
Division 1.2
(Permanent)
Divison 1.3
Division 1.4
Division 1.5
Type 2
Division 1.1
(Portable)
Divison 1.2
Division 1.3
Division 1.4
Division 1.5
Division 1.1
Type 3
Division 1.2
(“Day Box” for)
Divison 1.3
temporary storage)
Division 1.4
Division 1.5
Division 1.3
Type 4
Division 1.4
Divison 1.5
[FNa1]Electric Blasting Caps
Type 5
Divison 1.5
[FNa1] As a result of tests with electric blasting caps, it has been determined that these blasting caps are not subject to sympathetic detonation. Therefore, a Type 4 storage facility meets the necessary requirements for storage of blasting caps that do not mass detonate.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. New Plate B-14a filed 6-26-97; operative 7-26-97 (Register 97, No.26). For prior history, see Register 85, No. 30.
PLATE B-14-b
History
1. Repealer filed 7-26-85; effective thirtieth day thereafter (Register 85, No. 30).
PLATE B-14-c
History
1. Repealer filed 7-26-85; effective thirtieth day thereafter (Register 85, No. 30).
PLATE B-15
Table 1
Recommended Distances for Commercial
AM Broadcast Transmitters
0.535 to 1.605 MHz
Transmitter Power [FN1]
Minimum Distance
(Watts)
(Feet)
Up tp 4,000
800
5,000
900
10,000
1,300
25,000
2,000
50,000 [FN2]
2,900
100,000
4,100
500,000
9,100
[FN1] Power delivered to antenna.
[FN2] 50,000 watts is the present maximum power of U.S. broadcast transmitters in this frequency range.
Table 2
Recommended Distances for Transmitters up to
50 MHz (Excluding AM Broadcast) Calculated
for a Specific Loop Pickup Configuration [FN1] [FN2]
Transmitter Power [FN3]
Minimum Distance
(Watts)
(Feet)
100
800
500
1,700
1,000
2,500
5,000
5,500
50,000
17,000
500,000 [FN4]
55,000
[FN1] Based on the configuration shown in Fig. 2b, using 20.8 MHz, which is the most sensitive frequency.
[FN2] This talbe should be applied to International Broadcast Transmitters in this 10-25 MHz range.
[FN3] Power delivered to antenna.
[FN4] Present maximum for International Broadcast.
Table 3
Recommended Distances of Mobile Transmitters
Including Amateir and Citizens Band
MINIMUM DISTANCE (Feet)
VHF
VHF
UHF
35 to 36 MHz Public Use
144 to 148 MHz Amateur
450 to 470 MHz Public Use
Transmitter [FN1]
MF
HF
42 to 44 MHz Public Use
150.8 to 161.6 MHz
Cellular Automobile
Power
1.6 to 3.4 MHz
28 to 29.7 MHz
50 to 54 MHz Amateur
Public Use
Telephone Above 800 MHz
(Watts)
Industrial
Amateur
5
30
70
60
20
10
10
40
100
80
30
20
50
90
230
180
70
40
180
120
320
260
100
60
180 [FN2]
170
430
350
130
80
250
200
500
410
160
90
500 [FN3]
280
710
280
220
120
600 [FN4]
300
780
640
240
140
1,000 [FN5]
400
1,010
820
310
180
10,000 [FN6]
1,240
3,200
2,600
990
560
Citizens Band, Class D Transmitters, 26.96-27.41 MHz
Recommended Minimum Distance
Type
Hand-Held
Vehicle-Mounted
Double sideband-4 watts maximum
transmitter power
5 ft.
65 ft.
Single Sideband-12 watts peak
envelope power 20 ft.
110 ft.
[FN1] Power delivered to antenna.
[FN2] Maximum power for two-way mobile units in VHF (150.8 or 161.6 MHz range) and for two-way mobile and fixed station units UHF (450 to 460 MHx range).
[FN3] Maximum power for major VHF two-way moblie and fixed station units in 35 to 44 MHz range.
[FN4] Maximum power for two-way fixed station units in VHF (150.8 t o 161.6 MHz range).
[FN5] Maximum power for amateur radio moblie units.
[FN6] Maximum power for some base stations in 42 to 44 MHz band and 1.6 to 1.8 MHz band.
Table 4
Recommended Distances for VHF TV
and FM Broadcasting Transmitters
Effective Radiated Power
Minimum Distance (Feet)
(Watts)
Channels 2 to 6
FM Radio
Channels 7 to 13
Up to 1,000
1,000
800
600
10,000
1,800
1,400
1,000
100,000 [FN1]
3,200
2,600
1,900
316,000 [FN2]
4,300
3,400
2,500
1,000,000
5,800
4,600
3,300
10,000,000
10,200
8,100
5,900
[FN1] Present maximum power channels 2 to 6 and FM-100,000 watts.
[FN2] Present maximum power channels 7 to 13-316,000 watts.
Table 5
Recommended Distances from UHF TV Transitters
Effective Radiated Power
Minimum Distance
(Watts)
(Feet)
Up to 10,000
600
1,000,000
2,000
5,000,000 [FN1]
3,000
100,000,000
6,000
[FN1] Present maximum power channels 14 to 83--5,000,000 watts.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Repealer of Plates B-15-a and B-15 filed 7-8-81; effective thirtieth day thereafter (Register 81, No. 30).
2. Amendment of NOTE filed 7-26-85; effictive thirtieth day thereafter (Register 85, No. 30).
3. Repealer and new Plate B-15 filed 6-26-97; operative 7-26-97 (Register 97, No. 26).
PLATE B-16
LADDERS
Safe Procedure In Setting Up a Ladder
The base should be one-fourth the ladder length from the vertical plane of the top support
History
1. Amendment filed 5-21-75; effective thirtieth day thereafter (Register 75, No. 21).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-17
CRITERIA FOR STAIRS, LADDERS AND RAMPS OR INCLINES
“Don't be the Fall Guy” (for stairs installed on or after April 3, 1997)
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Amendment filed 5-21-75; effective thirtieth day thereafter (Register 75, No. 21).
2. Amendment filed 12-4-2007; operative 1-3-2008 (Register 2007, No. 49).
3. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-18
LIGHT-TRADE POLE SCAFFOLD
For Scaffolds Over 20 Feet High Use 3″ x 4″ Uprights
For carpenters, lathers, shinglers, painters, plasterers, sheet metal workers and other trades not using heavy tools or storing heavy materials on the scaffold.
Note: (1) Continous sills may be required on pavement or other surfaces that might cause slipping. When uprights are placed on the ground, they must rest on sills or foot blocks that are adequate to sustain the load.
(2) Ladders do not have to be placed as shown, but may be located at any suitable place on the scaffold that gives proper access to the platform or platforms.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Repealer and new Plate B-18 filed 3-19-79; effective thirtieth day thereafter (Register 75, No. 21).
2. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
3. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-19
HEAVY-TRADE POLE SCAFFOLD
For Scaffolds Over 20 Feet High Use 4‘ x 6‘ Uprights
For bricklayers, stone masons, stone cutters, concrete workers and other trades using heavy tools or storing heavy materials on the scaffold.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Repealer and new Plate B-19 filed 3-19-79; effective thirtieth day thereafter (Register 79, No. 12).
2. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
3. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-20
WOODEN BRACKETS SCAFFOLD (Suggested)
(Can be Prefabricated for Attachment to Wall Forms at Various Postions, Or Can be Made As a Permanent Part of Movable Form Panel)
NOTE: (1) Maximum load is 25 psf.
(2) For railing and toeload requirments, see Article 16 and Section 1645.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-21 METAL BRACKET SCAFFOLD (Suggested)
(‘WALER JACK‘)
NOTE: Bracket shold not be usded on walers held by wire unless there are at least three such ties fairly close to each jack. Bolted walers are preferred where brackets are used.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-22
LIMIT SPANS TO 7'6‘ (Suggested)
(FOR MULTIPLE SCAFFOLD USE AT LEAST 3‘ X 16‘ OUTRIGGERS)
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-23 BOATSWAIN'S CHAIR (Suggested)
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Amendment of Plates B-18, B-19, B-20, B-21, B-22, and B-23 filed 11-14-75; effective thirtieth day thereafter (Register 75, No. 46).
2. Relocation and amendment of former Plate B-23 to Section 1662(j) filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
PLATE B-24
OUTRIGGER BEAM FOR SUSPENDED STAGING (Suggested)
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Renembering and ammendment of former Plate B-24 to Plater B-26 and renumbering and amendment of Plate B-23-a to Plate B-24 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-24 ACCEPTABLE SCAFFOLDS (Suggested)
History
1. Renembering and ammendment of former Plate B-24 to Plater B-26 and renumbering and amendment of Plate B-23-a to Plate B-24 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
PLATE B-24-a SUSPENDED LADDER SCAFFOLDS (Suggested)
History
1. Renembering and ammendment of Plate B-24 to Plater B-26 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
PLATE B-25 SWING STAGE SHOWING CENTER SUPPORT
History
1. Renembering and ammendment of Plate B-24 to Plater B-26 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
PLATE B-25-a
SAFE HITCHES AND KNOTS
History
1. Renembering of Appendix Plate C-7 to B-25-a filed 2-19-75; effective thirtieht day thereafter (Register 75, No. 8).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-25-b
PAINTER'S HITCH
STEPS IN MAKING A SAFE HITCH
1. Locate and prepare a place where load is to go.
2. Determine the weight of the load.
3. Determine the places where the hitching equipment is to be put on.
4. Decide on the type of hitch and hitching equipment which is necessary.
5. Decide on size of hitching equipment.
6. Put on hitch after checking condition of hitching equipment.
7. Take out hte slack and check the hitch.
8. Raise the load to a safe level and travel to the destination.
9. Lower the load near the landing area.
10. Adjust the blocking.
11. Set the load down onthe blocking.
12. Remove the hitching equipment.
13. Check the hitching equipment.
14. Return equipment to proper place.
History
1. Renembering of Appendix Plate C-8 to B-25-B filed 2-19-75; effective thirtieht day thereafter (Register 75, No. 8).
2. Change without regulatory effect amending step 1 in Plate B-25-b filed 5-28-91 pursuant to section 110, title 1, California Code of Regulations (Register 91, No. 27).
3. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-26
ACCEPTABLE SCAFFOLDS (Suggested [FNa1])
SUSPENDED SCAFFOLD
[FNa1]
See section 1658 for required railing protection
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Amendment of Plate B-26 filed 11-14-75; effective thirtieht day thereafter (Register 75, No. 46).
2. Renembering and ammendment of Plate B-26 to Plater B-29, and renumbering and amendment of former Plate B-24 to Plate B-26 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
3. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-26-a
SUSPENDED LADDER SCAFFOLDS (Suggested) [FNa1]
[FNa1]
See section 1658 for required railing protection
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Renembering and ammendment of Plate B-24-a to Plater B-26-a filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-27
MASON'S OUTRIGGER SCAFFOLDS (Suggested)
PLATE B-27-a
WELDERS' PLAFTFORM CAGES (Suggested)
History
1. Renembering and ammendment of Plate B-28 to Plater B-27-a, filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-28
SWING STAGE SHOWING CENTER SUPPORT ACCEPTABLE FOR RAILNG REINFORCEMENT [FNa1]
[FNa1]
See section 1658 for required railing protection
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Renembering and ammendment of former Plate B-28 to Plater B-27-a and renumbering and amendment of Plate B-25 to Plate B-28 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-29
ACCEPTABLE MASONS' SUSPENDED SCAFFOLD
That Will Comply with Order No. 1659 Limit Plank Spans to 8' -0‘
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Renembering and ammendment of former Plate B-29 to Plate B-31, and renumbering and amendment of Plate B-26 to Plate B-29 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-29, B-29-a and B-29-b
History
1. Renembering of former Plates B-29 to Plate B-29-b to Plates B-31, B-31-a and B-31-b filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
PLATE B-30
Nails and Spikes.
(1) Safe Lateral Strength. A common wire nail driven perpendicular to grain of the wood, when used to fasten wood members together, shall not be subjected to a greater load causing shear and bending than the safe lateral strength of the wire nail or spike as set forth in Plate B-30-a.
A wire nail driven parallel to the grain of the wood or toe nailed shall not be subjected to more than two-thirds of the lateral loade allowed when diven perpendicular to grain.
PLATE B-30-a SAFE LATERAL STRENGTH AND REQUIRED PENETRATION OF COMMON WIRE NAILS Driven Perpendicular to Grain of the Wood
Loads (pounds)
Standard
Penetration
Douglas Fir
length
Wire
required
or
Size of nail
(Inches)
gauge
(inches)
southern pine
Redwood
Other species
6d
2
11 1/2
1
70
58
As
8d
2 1/2
10 1/4
1 1/4
100
82
determined
10d
3
9
1 1/2
120
98
by the
12d
3 1/4
9
1 5/8
130
106
enforcing
16d
3 1/2
8
1 5/8
160
123
agency
20d
4
6
2
190
155
30d
4 1/2
5
2 1/4
230
188
40d
5
4
2 1/2
270
220
50d
5 1/2
3
2 3/4
310
250
60d
6
2
3
360
295
(2) Safe Resistance to Withdrawal. A wire nail driven perpendicular to grain of the wood shall not be subjected to a greater load, tending to cause withdrawal, than the safe resistance of the nail to withdrawal, as set forth in Plate B-30-b.
Nails driven parallel to grain of the wood shall not be allowed for resisting withdrawal forces.
PLATE B-30-b SAFE RESISTANCE TO WITHDRAWAL OF COMMON WIRE NAILS
Inserted Perpendicular to Grain of the Wood in Pounds per Linear Inch of Penetration into the Main Member
Kind of wood
Size of nail
Douglas Fir or Southern Pine
6d 8d 10d 12d 16d 20d 30d 40d 50d 60d
or Redwood
27 29 35 35 39 48 52 56 61 67
Other Species
As determined by the enforcing agency
(3) Spacing and Penetration. Common wire nails shall have peretration into the piece receiving the point as set forth in Plate B-30-a. Nails or spikes, for which the wire gauge or lengths are not specified in Plate B-30-a, shall have a required penetration of not less than nine and one-half diamenters, and allowable loads may be interpolated.
For wood to wood joints the spacing center-to-center shall be not less than the required penetration.
Edge and end distances shall be not less than one-half of the required penetration.
Holes for nails, where necessary to prevent splitting, shall be bored of a diameter smaller than that of the nails.
PLATE B-31 BOLTS
Safe loads in pounds for bolts in double shear and in seasoned lumber of the following species: cypress, southern; Douglar fir (coast and inland region); larch, western, pine, southern yellow; in joints consisting of three members in which the side members are one-half the thickness of the main member, shall not exceed values set forth in Plates B-31-a, -b.
PLATE B-31-a HOLDING POWER OF BOLTS Loads Parallel to Grain (p)
Length of
Diameter of bolt (inches)
bolt in main
 
member [FN1]
(inches)
1/2
5/8
3/4
7/8
1
1 1/8
1 1/4
1 5/8
910
1,160
1,390
1,630
1,960
2 5/8
1,150
1,700
2,190
2,610
3,010
3 5/8
1,160
1,810
2,570
3,310
3,990
4 1/2
1,160
1,810
1,600
2,530
4,480
5,380
5 1/2
-
1,810
2,620
3,550
4,610
5,800
6 1/2
-
1,810
2,600
2,550
4,630
5,850
7 1/2
-
1,810
2,600
3,550
4,630
5,850
9 1/2
-
-
2,600
3,550
4,630
5,850
7,240
11 1/2
-
-
-
-
4,630
5,850
7,240
[FN1] This assumes dressed size lumber. Safe loads for other lengths of bolt in main member may be obtained be interpolation.
TABULAR OR GRAPHIC MATERIAL SET FORTH AT THIS POINT IS NOT DISPLAYABLE
PLATE B-31-b HOLDING POWER OF BOLTS Loads Perpendicular to Grain (p)
Length of
Diameter of bolt (inches)
bolt in main
 
member [FN1]
(inches)
1/2
5/8
3/4
7/8
1
1 1/8
1 1/4
1 5/8
430
490
540
600
660
2 5/8
700
790
880
970
1,050
3 5/8
920
1,090
1,210
0,340
1,460
4 1/2
920
1,300
1,510
1,660
1,810
1,970
5 1/2
-
1,800
1,750
2,020
2,210
2,410
6 1/2
-
1,250
1,750
2,260
2,590
2,860
7 1/2
-
1,170
1,890
2,250
2,820
3,250
9 1/2
-
-
1,520
2,120
2,760
3,450
4,130
11 1/2
-
-
-
-
2,570
3,200
4,040
[FN1] This assumes dressed size lumber. Safe loads for other lengths of bolt in main member may be obtained be interpolation.
TABULAR OR GRAPHIC MATERIAL SET FORTH AT THIS POINT IS NOT DISPLAYABLE
History
1. Renembering and amendment of Plates B-29, B-29-a and B-29-b to Plate B-31, B-31-a and B-31-b filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
PLATE B-32
(EXAMPLE)
BRICKLAYERS' SQUARE SCAFFOLD
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. New Plate B-32 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-33
PUMP JACK SCAFFOLD (EXAMPLE)
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. New Plate B-33 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-34
(EXAMPLE)
LADDER JACK SCAFFOLD
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. New Plate B-34 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-35
(EXAMPLE)
WINDOW JACK SCAFFOLD
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. New Plate B-35 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-36
(EXAMPLE)
STONE SETTERS' ADJUSTABLE MULTI-POINT SUSPENDED SCAFFOLD WITH MANUAL WINDING DRUM HOIST
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. New Plate B-36 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-37
NEEDLE BEAM SCAFFOLD (EXAMPLE)
STRUCTURAL MEMBER ABOVE
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. New Plate B-37 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-38
FLOAT SCAFFOLD (EXAMPLE)
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. New Plate B-38 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-39
TWO-POINT SUSPENDED SCAFFOLD (Example)
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. New Plate B-39 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-40
PROHIBITED SCAFFOLD (Examples)
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Renumbering and amendment of former Plate C-20 to Plate B-40 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-41
SUGGESTED SCAFFOLD HORSES (See Construction Safety Order 1674)
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. Renumbering and amendment of former Plate C-21 to Plate B-41 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).
PLATE B-42
MULTI-LEVEL SUSPENDED SCAFFFOLD WITH POWER HOISTS
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
History
1. New Plate B42 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
2. Change without regulatory effect providing more legible illustrations filed 8-4-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 32).


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